Nf. Andreyev et al., PHASE-CONJUGATION TO UPGRADE EFFICIENCY OF SOLID-STATE-LASER ENERGY-CONVERSION TO NARROW-BAND TEM(00) MODE PULSES, IEEE journal of quantum electronics, 30(2), 1994, pp. 305-313
The possibility of increasing the radiation energy extraction from act
ive elements of YAG:Nd lasers using an oscillator combined with a doub
le-pass amplifier, as well as a four-pass scheme, is shown.